Liquid-supply apparatus.



No. 7||,67|. Patented oct. 2|, 1902.

E. T Mluua4 Y y LIQUID SUPPLY APPARATUS.

v l' (Application filed Jau., 2, 19.02,) l (No Model.) l 2 Sheets-SheetI.

No, 7u,s7|. Patented yorxfzl, 1902.

E. T. Mums.

LIGUID -SUPPLY APPARATUS.v

(Appliation file Jan. 2, 1902.)

2 Sheets-Sheet 2.

f 3% 5 2 j .5' 32 f 5 y Nv y f mi UNITED STATES PATENT OFFICE" EDDY T.MCKAIG, OF CHIOAGQILLINOIS.

LIQUID-SUPPLY APPARATUS.

SPECIFICATION forming part of Letters Patent No. 711,671, dated October21, 1902. Appnmiov ned January 2,1902. serial No. 88,083. (No modem Toall whom t may concern.- Y

Be it known that I, EDDY T. MCKAIG, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Liquid-Supply Apparatus,ofV

which the following is a specification.

My invention relates to a novel apparatus for maintaining a supply ofliquid at a constant pressureand while I have shown my invention asapplied to maintaining a supply of gasolene or some other liquidhydrocarbon at a, uniform pressure for the purpose of operating agasolene-engine it will be understood that it is capable of use in anyother connection Where it is desired to keep a supply of liquid at aconstant pressure.

To illustrate my invention, I annex hereto two sheets of drawings, inwhich the same reference characters are used to designate identicalparts in all-the figures, of which- Figure 1 is aplan view of myinvention as applied to a gasolene-engine. Fig. 2 is a side elevation ofthe same. Fig. 3 is a plan view ofthe pumping mechanism, on an enlargedscale; and Figs. 4, 5, 6, and 7 are vcrticalsections on the lines A A, B13,0 C, and D D of Fig. 3, respectively. v I have shown my invention asapplied for convenience to a gasolene-engine of the type shown in myapplication, Serial No. 73,353, led August 26, 1901, and by reference toFig. 2 it will be seen that I have grouped together on the base 10 theengine 11 at one end, the oil-supply tank 12 at the other endyandthepumping mechanism 13 intermediate. As a matter of convenience I maysupport the water-supply tank 14 upon a platform -15 over the oil-supplytank, the platform 15 resting on the sills 16 on either side of theoil-supply tank 12. The oil-supply tank 12has the pipe 17 leading fromit to the pumping apparatus. 13, by which a constant stream of oilisdrawn;

ciprocate in a straight line despite the swinging movement of thelever23, which .is pivcured to a projection from the cylinder 21 of theengine.

pivotally connected, as at 26, to the link 2,7, which is reciprocated atconvenient intervals, such as each revolution of the shaft 28, by meansof any suitable mechanism-such, for instance, as shown in my aforesaidIapplilcation,` Serial No. '73,358.-

The pumping apparatus proper is in the preferred form of my inventionall included in the casting 29, which is preferably of a generallycubical shape and is provided at its lower side with the iiange 30, bywhich it may be secured to the base 10. The piston 22 reciprocates inthe barrel 31, located in the corner of the casting nearest the engine.As shown, the lower portion of `this barrel is formed by the interior.of the casting itself, whilethe upper portion is formed by a tube cap orgland 3la at its upper end to prevent any escape of the oil. To preventthe hydrostatic pressure ofthe oil inthe reservoir 12 from tending toforce the oil out through the gland, I locate the gland above the planeof the top of the reservoir. is connected at its lower end by thehorizontal channel or passage 32 with the valve-chamber 33, which issimilar in shape to the barlvrel 31,V but has its-upper end closed bythescrew-plug 34, which may have the recess'35 thereinto guide theupwardly-proj ecting stem 36 of thevalve 37, which rests on thevalvevseat 38, formed between the chamber 33 and the reduced passage 39,forming a downwardly-extending continuation of the cham- :her 33 andopening into the horizontal passageI -40,*into which is screwed the endof the it will be apparent that as thepiston-is raised the horizontalpassage. 40, upward through the passage 39 past the valve 37 into thevalve-chamber 33,through the horizontal passage 32, and into the barrel31. As the piston descends the check-valve 37 prevents the return of theoil, so that it is forced downward through the vertical passage 41,form- .ing the reduced extension of the barrel 31,

oted at 24 to a bracket 25, conveniently se- The barrel 31 the oil willbe drawn from the pipe 17 throughy elongated slot, so that the piston 22.can re- The otherendof the'lever 23 is screwed therein and providedwith a packing oil-supply pipe 17. With this construction los` throughthe horizontal passage 42, thence upward through the vertical passage43, which opens by means ot the valve-seat 44into the enlargedvalve-chamber 45,1ocated diagonally Opposite to the valve-chamber Theupper end of this valve-chamber 45 is closed by the screw-threaded plug46, similar to the plug 34, and contains the check-valve 47, cooperatingwith the valve-seat 44 and similar to the check-valve 37. The oilpassing this valve 47 as the pumppiston descends is forced through thehorizontal passage 48 across to the chamber 49, which is diagonallyopposite to the barrel 31. This chamber 49 has screwed or otherwisesecured in the upper end thereofthe outer tube 50 of the standpipe 18,which extends to any height necessary to secure the desired pressure andpreferably has its upper end covered, but not closed air-tight, as bythe cap 51. The smaller interior pipe of the stand-pipe extends nearlyto the pipe 50, has its upper end open, and its lower end is screwed orotherwise secured in the reduced downwardly-extending portion 53 of thechamber 49. This extension 53 is connected by the passage 54 with thepassage 40. The chamber 49 has opening into it the oil-discharge pipe19, which, as seen in Fig. 7, is screwed into a suitable recess leadingfrom the side of the casting into the chamber 49. For convenience inconstructing the passage 42 it is bored from one side of the casting,and the portion of the passage thus formed outside of the channel 41 isfilled by a plug 55.

The operation of the complete apparatus will now be readily apparent. Asthe pump is constantly operated while the engine is running, the supplyof liquid fuel drawn from the tank 12 is pumped into the chamber 49,where if the pressure exceeds that desired the oil rises in thestand-pipe outside of the inner pipe 52 until it reaches the top, whenit overllows and descends through the inner pipe 52 and then flowsthrough the passage 54 back to the oil-supply pipe 17, whence anysurplus of oil is immediately drawn back through the pump, so that aconstant supply is maintained without the necessity of drawing any morethan the amount consumed from the tank l2, and the supply is maintainedat the uniforln pressure caused by the height of the column of oil inthe stand-pipe 18.

While I have shown my invention as embodied in the form which I atpresent consider best adapted to carry out its purposes, it will beunderstood that it is capable of modifications and that I do not desireto be limited in the interpretation of the following claims except asmay be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. In a device of the class described, the combination with asupply-reservoir, of a pump, means for operating said pump, connectionsbetween said pump and supply-reservoir, a stand-pipe connected to saidpump, a discharge-pipe connected to said stand-pipe, and anoveriiow-pipe in said stand-pipe opening into the connections betweenthe pump and the supply-reservoir.

2. A pump consisting of the four rectangularly-disposed chambers,check-Valves in two of the diagonally opposite chambers, adischarge-pipe connected with one and a pumppiston in the other of theremaining chambers, passages connecting the pump-chamber with thecheck-valve chambers, a supplypipe connected to one of the checkvalvechambers, and a passage connecting the other check-valve chamber and thechamber connected to the discharge-pipe.

3. A pump consisting of the four rectangularly-disposed chambers,check-valves in two of the diagonally opposite chambers, adischarge-pipe together with a stand-pipe having an overiow connectedwith one and a pump-piston in the other of the remaining chambers,passages connecting the pumpchamber with both the check-valve chambers,a supply-pipe connected to one of the checlvalve chambers, and a passageconnecting the other check-valve chamber and the stand-pipe chamber.

4. A pump consisting of the four rectangularly-disposed chambers,check-valves in two of the diagonally opposite chambers, a standpipehaving an interior overflow-pipe and a discharge-pipe connected withone, and a pump-piston in the other, of the remaining chambers, passagesconnecting the pumpchamber with both the check-valve chambers, asupply-pipe connected with one of the check-valve chambers and with theoverlowpipe, and a passage connecting the other check-valve chamber andthe stand-pipe chamber.

5. A pump comprising the casting having the four chambers therein, thefirst one containinga check-valve and having a supplyopening thereinbelow the check-valve, the second containing a piston and connected withthe first by a passage opening above the check-valve, the thirdcontaining a second check-valve and connected with the second chamber bya passage opening into it above the second check-valve, the fourth onehaving a stand-pipe and a discharge-aperture and connected to the thirdby a passage opening into it above the second check-valve, anoverflow-pipe in said stand-pipe open at its upper end and having itslower end passing through the bottom of the fourth chamber, and apassage connecting the lower end of said overflow-pipe with thesupply-opening of the first chamber.

In testimony whereof I affix my signature in presence of two witnesses.

EDDY T. MCKAIG.

Witnesses:

JOHN H. MoELRoY, HATTIE O. I-IALvoRsoN.

IOO

